Planning for the weather is a good way to make your trip to La Vega relaxing and enjoyable, especially when you're splurging. The hottest months are usually September and August, with an average temperature of 17°C, while the coldest months are January and December, with an average of 16°C. The rainiest months in La Vega are March, November, April and October, with each month seeing an average of 302 mm of rainfall.